Sensorless PMSM drive with DC-link current measurement

Antti Piippo, Kalle Suomela, Marko Hinkkanen, Jorma Luomi

    Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

    8 Citations (Scopus)
    157 Downloads (Pure)


    The paper proposes a motion-sensorless control method for permanent magnet synchronous motor drives when only the DC-link current is measured instead of the motor phase currents. A two-phase pulse-width modulation method is used, allowing the DC-link current to be sampled twice in a switching period at uniform intervals during active voltage vectors. A method is proposed for obtaining the current feedback for vector control, and an adaptive observer is used for estimating the rotor speed and position. The estimation is augmented with a high- frequency signal injection method at low speeds; a modified high- frequency excitation voltage is proposed for better performance. The proposed method enables stable operation of the permanent magnet synchronous motor drive in a wide speed range and under various loads. The effectiveness of the proposed method is demonstrated both by simulations and laboratory experiments.
    Original languageEnglish
    Title of host publicationConference record of the 2007 IEEE Industry Applications Conference Forty-Second IAS Annual Meeting (IAS'07)
    Number of pages7
    ISBN (Electronic)1-4244-1260-9
    Publication statusPublished - 23 Sep 2007
    MoE publication typeA4 Article in a conference publication
    Event IEEE Industry Applications Society Annual Meeting - New Orleans, LA, United States
    Duration: 23 Sep 200727 Sep 2007


    Conference IEEE Industry Applications Society Annual Meeting
    Abbreviated titleIAS
    CountryUnited States
    CityNew Orleans, LA


    • DC-link current measurement
    • permanent magnet synchronous machine
    • sensorless control
    • signal injection

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